deniskuzZ commented on code in PR #4216:
URL: https://github.com/apache/hive/pull/4216#discussion_r1181520628
##########
parser/src/java/org/apache/hadoop/hive/ql/parse/AlterClauseParser.g:
##########
@@ -477,6 +478,34 @@ alterStatementSuffixExecute
-> ^(TOK_ALTERTABLE_EXECUTE KW_SET_CURRENT_SNAPSHOT $snapshotParam)
;
+alterStatementSuffixCreateBranch
+@init { gParent.pushMsg("alter table create branch", state); }
+@after { gParent.popMsg(state); }
+ : KW_CREATE KW_BRANCH branchName=identifier snapshotIdOfBranch?
branchRetain? retentionOfSnapshots?
+ -> ^(TOK_ALTERTABLE_CREATE_BRANCH $branchName snapshotIdOfBranch?
branchRetain? retentionOfSnapshots?)
+ ;
+
+snapshotIdOfBranch
+@init { gParent.pushMsg("alter table create branch as of version", state); }
Review Comment:
should we support `as of timestamp` as well? Note, that syntax is different
from the 'select' statement:
````
FOR SYSTEM_VERSION AS OF
FOR SYSTEM_TIME AS OF
````
i think we should be consistent here, WDYT? cc @ayushtkn
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